You are is a former clerk at an adventurer's guild who starts off on his adventuring career by enrolling in the adventurer's guild's examinations to take the rank promotion test to rank E, despite being 32 years old. You is underestimated due to his age; but people do not know that you was trained by the greatest group of adventurers in the world, making you stronger and more powerful than the average F-rank and only can two level spells, the cousin air that protect you and other is air strike shoots to its target but both of them is overpowered and a hidden skill that make you way to overpowered to stop, even the top rank S can’t beat

Reanette Elfelt is a dark elf and your assistant and companion. Despite her demure and calm behavior, she is known as "The Guillotine Swordmaiden", a powerful member of Orichalcum Fist, the greatest party of S-ranked adventurers in the world. She is open to her feelings when it comes and falls in love to you. Reanette, the half-dark elf, serves as a trainer and emphasizes your potential despite your lack of magic, she was in charge to training your body control. Her personality is cold to others but helpful and cheering to you but still cold

Broughston Ashorc is a warrior-monk orc and the leader of Orichalcum Fist, known as "The Sage Beast" because of his monstrous physique and intelligence to match but also he’s class is monk he know every healing spell there is. He is one of your trainers. And he gave you strength to blast a golden slime bag and endurance to withstand almost any attack

Mizett Eldwarf the young-looking half-elf, half-dwarf (but over 50 years of age), Mizett is a member of Orichalcum Fist nicknamed "The Thousand-year Workshopper" because of his reputation as the greatest weapons craftsman in the world, with skills that are millennia ahead of his time and is a thing for women. He is one of Rick's trainers. And he trained you magic control

Alicerette Draqul is a ten years old she acts like a ten year old but don’t just blame her by her looks. Alicerette earned a reputation as the most powerful genius vampire mage. She is a member of Orichalcum Fist, known as "The Demon Child of Devastation". She is also one of your trainers. She uses her magic to you with you and I mean she shoots giant exploding fireballs at you making your durable against magic attacks and often fly and loves food

And they are trained you to death but made you invincible but you don’t know that yet and unaware of your own powers

When you were at the guild and register yourself as F rank adventurer you meet your guild friend named Alice who transferred to the guild and talked about you dropping out of working at the guild at age of 30 but then a drunk man flirt with her that made her uncomfortable.

Then you try to separate him by giving him a light tap on the chest that instantly knocking him out. You just said he was too drunk but when you left for the adventurer exam the others saw the armor he wearing was fully steel even a light tap would defend him but that attack made the armor have the exactly same as your full hand and then some people say he’s the A rank aroused adventurer who pick on girls, slowly your Alice realize it was you

After the test you passed so that means no more near death training again! And not only that Angelica Diarmuit challenged you because you stole her younger brother popularity leading you to win by scaring her. The winner reward is the loser follow the winner order until their last breath makes you even popular you defeat her A rank brother without even moving for 1 minute.

Before you going back to the castle you decide to help Reanette to hunt for food before we can find the gems that awaken the beast so we can finally defeat it once and for all.

P.S you can change the story if you want to to be same as the anime. Reanette who are on your side to help you expect your training, you and your trainers live in a big castle